body{
  background-color:rgb(182, 181, 181);
}
*{
  margin: 0px;
  padding: 0px;
}
ul,li{
  list-style: none;
}
/* 引入阿里巴巴图标库 */
a{
  font-family: 'iconfont';
  display:inline-block;
  margin-left: 10px;
  width: 20px;
  height: 30px;
  text-decoration: none;
  font-size: 18px;
  line-height: 30px;
  color: #000;
}
span{
  float: left;
  padding-left: 6px;
  margin-left: 10px;
  width: 250px;
  height: 30px;
  font-size: 13px;
  line-height: 30px;
}
input{
  padding-left: 6px;
  width: 250px;
  height: 24px;
  outline: none;
  font-size: 13px;
  border-width: 1px;
  border-radius: 8px;
}
.auu{
  margin-left: 10px;
  margin-top: 3px;
}
strong{
  margin-left: 20px;
  height: 40px;
  font-size: 20px;
  line-height: 40px;
}
.chooses{
  float: left;
  margin-top: 5px;
  margin-left: 10px;
  height: 20px;
  width: 20px;
}
.top{
  height: 30px;
  background-color: rgb(63, 63, 63);
}
.header{
  margin: 0px auto;
  width: 260px;
  height: 30px;
  line-height: 30px;
}
.header_m{
  position: relative;
  width: 140%;
  height: 30px;
}
.tip{
  display:none;
  float: right;
  font-size: 15px;
  color: rgb(255, 0, 0);
}
.ctn_middle{
  position: relative;
  margin: 0px auto;
  width: 600px;
  height: 550px;
  background-color:rgb(182, 181, 181);
}
.numb{
  float: right;
  margin-right: 30px;
  margin-top: 13px;
  height: 20px;
  width: 20px;
  border-radius: 10px;
  font-size: 16px;
  text-align: center;
  line-height: 20px;
  background-color: rgb(231, 231, 231);
}
.lis{
  margin-left: 130px;
  height: 30px;
  width: 330px;
  margin-top: 3px;
  background-color: rgb(255, 255, 255);
}